Pneumatic pump



M. C. WALLS.

PNEUMATIC PUMP. APPLICATION FILED MAY 17, 1917.

Patented May27,1919.

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M. C. WALLS.

PNEUMATIC PUMP. APPLICATION FILED MAY 17, 1917- Lawmm, I Patented May 27, 1919.

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M. C. WALLS. PNEUMATIC PUMP,

APPLICATION FILED MAY 17. 1917.

L305,@4n Patented May 27,1919.

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. IIVVEAITTOR:

MARION C. WALLS, OF FRANKLIN TOWNSHIP, HENDRICKS COUNTY, INDIANA, ASSIGNOR 0F ONE-HALF TO GEORGE W. WEST, OF AMO, INDIANA.

PNEUMATIC PUMP.

, eoaoao.

Toull whom it may concern: Be it known that I, MARION C. WALLS, a citizen of the United States, residing in Franklin township, in the county of Hendricks and State of Indiana, have invented a. new and useful Pneumatic Pump,,of which the followingis a specification, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon.

This invention relates to means for umping or forcing liquid by the use 0 compressed air, the invention having reference more particularly to a pneumatic pump provided with electrical controlling means so as to be'adapted for pumping and delivering water intermittingly as may be required. An object of the invention isto provide an improved pneumatic pump that shall be so constructed as to be simple, not liable to become deranged and which shall have few parts liable to suffer'from wear in use. An-

other object is to provide-an eflicient pneu-' ing readily installed in position and permit ready access to the various parts thereof when repairs may be necessary, and which will be durable and economical in use.

With the above-mention'ed and other obl ects 1n vlew, the invention consists 1n a dual pneumatic pump provided with means for automatically controlling the flow of, compressed air for the operation of the pump in synchronism with the control of the flow ofwater from the pump, the pump including novel means for contro'lling the flow of the actuating air while in operation.

The invention consists also further in the novel y parts and combinations and. arrangements of partsflas hereinafter, particularly de-- scribed and further defined in the appended claims.

Referring to the draw1ngs,F1gure 1 1s Specification of Letters Patent.

Patented May 2?,1919.

Application filed May'17, 1917. Serial 'No. 169,196.

rams PATENT 'nic.

a sectional elevation of a pneumatic, pump constructedsubstantially in accordance with the invention; Fig. 2 is a sectional elevation of the pump partially, broken away and omitting a number offeatures seen' in the preceding figure; Fig. 3 is a horizontal section of the pump cylinder on the line IIIIII on Fig. 1; Fig. 4 is a section on the line IV-IV on Fig. 1; Fig. 5 is a bottom plan View of the pump cylinder; Fig.

6 is a vertical section of the more essential portions of the pump, relatively large parts being broken away; Fig. 7 is a top plan of an improved faucet or Valve comprising a feature of the invention; Fig. 8 is a side elevation partially broken away of the improved faucet or valve; Fig. 9 is a perspective view of one 'of the parts or portions of the lower pump cylinder head; Fig. 10 is a perspective view 0f0ne of the foot valves of the pump cylinder; Fig.' 11 is a vertical section of one of, the check valves for supporting the column of water in the discharge pipe; Fig. 12 is a ,horizontal section on the line XII-XII on Fig. 6; Fig. 13 is a fragmentary section on .theline XIII-XIII on Fig. 6; Fig. 14 is a sectional plan view on the line XIV-XIV on Fig. 6 looking up-' ward; Fig. 15 is a section on the line XVXV on Fig. 6; Fig. 16is a sectional elevation of the air-controlling apparatus adapted to be electrically operated and controlled to facilitate the operation and control of the pump; Fig. 17 is a vertical sec,

tion of one of the governing devices of the pump, taken on the line XVIIXVII on Fig. 15; Fig. 18 is a sectional detail showing one of the appliances relating to the operatmg mechanism of the pump and, Fig. 19 is of a pump cylinder in a well tube or casing 1 ,or in any body of liquid in such relation that the pump cylinder shall be immersed in the liquid which is to be elevated by the pump. The pump has practically two operative cylinders but for the purpose of compact con- I struction that may be readily admitted into a well casing, a hollow cylinder 2 is provided which has a central partition 3 there- 'in which divides the cylinder into two operative chambers that are provided respectively with bottom heads 4 and 4 and top being made separately as indicated. The

heads, 5 and 5',- the cylinder heads preferably bottom or lower heads are provided respectively with outside .hollow guides 6 and 6 and also apertures 7 and 7 respectively on either side of the guides. Foot valves 8 and ,8 are movably arranged upon the tops or inner sides of the heads 4- and 4 respectively and have guide stems 9 and 9 thereon that are movably arranged in the guides 6 and 6 I respectively, the valves being arranged so as to be lifted to a limited extent by the pressure of the water in which the cylinder is immersed. Preferably the cylinder heads are secured in place by means of rods 10 and cylinder and extend through and are se- 10' that extend through the respective water-chamfloers. An outlet pipe 11 is arranged in one of the chambers and a similar pipe 12 in the adjacent one of the chambers of the cured to the upper or top heads 5 and 5' respectively, and a single discharge pipe 13 is connected to the two outlet pipes and is of suitable length to conduct the water or other liquid to the desired height. The lower ends ofthe pipes 11 and 12 have valve casings 14 and 14 thereon in each of which is a suitable check valve 15, the valve casings being arranged conveniently near to the foot valves. The top of the discharge pipe '13 is provided with a suitable stop cock or-valve and preferably comprises a body 16 and a' and the exhaust air through the pipes. The

mechanism for automatically controlling the flow of air in the operation of the pump,

. comprises a plurality of valves and cham- -bers for the valvesand, in a convenient form for illustrating the invention, comprise an approximately U-shaped unitary casting havinga stem 21 and a relatively thinner stem 22 extending upward from a transverse base portion 23, the stems constituting the body portions or walls ofthe chambers, the

stem 21 having an air-chamber 24 therein to which a supply pipe 25 is ,-c0nnected.

The stem 21 of the casting constitutes an in-,

take valve chest and it hasalso a bore 26 therein adjacent to the chamber 24 and extending upwardfrom the lower end of the casting to constitute an intake valve chamber. The stem 22 of the casting constitutes an exhaust "alve chest and it has a bore 27 extending upward from the bottom of the casting to constitute an exhaust valve chamber. 'Thewall of the valve chest between the air-chamber 24 and the valve chamber 26 has an intake port 28 therein and the wall of the valve chamber has also a port 29 therein opposite to the port 28. The wall of the valve chamber 27 has a port 30 therein to admit exhaust airto the chamber. A conduit 3'1 is connected with the port 29 and also with the port 30. A branch conduit 32 is connected with the air-conducting pipe 19 and also with the conduit 31. Thefw'all of the chamber 27 has also an exhaust port 33 therein opposite to or on the plane of the port 30. Another intake port 34 extends rom the air-chamber 24 to the valve cham ber 26 and the wall of the valve chamber has aport 35 opposite to the port 34. The

wall of the valve chamber 27 has an intake port 36 therein above the port 30 and a conduit 37 is connected with the ports 35 and 36 to conduct exhaust air to, the valve chamber 27, the wall of the latter'having an exhaust port 38 on the plane of the port 36. A branch conduit 39 is connected with the pipe 20 and the conduit 37. Two cylindrical i or piston valves 40 and 41 are provided which are substantially alike and are closely fitted to slide longitudinally in the valve chambers 26 and 27 respectively, the valves extending out beyond the chambers and having stop shoulders 42 and 42 to engage the walls of the cylinders and limit the inward travel of the valves. The valve 40 has a circumferential groove 43 to constitute a duct between the ports 28 and 29 and it has also a similar groove 44'to constitute, when the valve is-moved outward in its chamber, a duct between the ports 34 and 3 5. The valve 41 also has a duct 45 to afford communication between the ducts 30 and 33 when the valve is moved inward, the valve having also a similar duct 46 to form communication between the ports 36 and 38 when the valve is moved outward. The base portion 23 of the casting has a bracket 47 thereon which supports a pivot 48 to which'a tumbler beam 49 is connected 'between its ends, the beam being suitably connected at its two ends with stems 50 and 50 with which the valves are respectively provided, so that each connection is of a pivotal character permitting slight slipping contact of the beam with respect to the stem. Preferably a coil sprlng is connected to and strained between the two stems to resist the tendency of the beam to force the two stems The arrangement is such, as will seen, that the beam synchronously connects the two valves together in such relation that when either valve is set in its inward position, the other valve is held in its outward position, so that the ducts of the valves shall have proper relation to the various ports of the valve chambers. Suitable provision is I made for holding the tumbler beam in its required positions and preferably comprises a bracket 52 which is fixed on the wall of the chamber 27, a' hollow cylinder 53 having trunnions 54 supported in the bracket so as the beam is moved upward the push bar acts to hold it up, thus preventing accidental movement of the air-controlling valves.

For the purpose of enabling .the compressed air when flowing in either of the airconducting pipes 19 and 20 to be utilized for actuating the air-controlling valves 4:0 and 41 automatically, suitable governing appliances are provided which preferably comprise two receptacles 57 and 58 that are connected by means of branch pipes 59 and 60 with the pipes 19 and '20, respectively and provided respectively with needle-feed valves I 61 and 62. The'receptacles-are connected by means of conduits 63 and 64 with the upper portions of the chambers 26 and 27 respectively to permit air to pass into the valve chambers, the walls of the latterhaving outlet ports 65 and 66 respectively to permit the escape of air when the valves uncover the ports, the 'ports being covered and closed when the valves are moved inward to their full extent. The needle-feed valves are to be set so as to slowly admit the air into the receptacles durin the time the compressed air acts to force t e water out of the cylinder chambers. v

Preferably the exhaust ports 33 and 38 are provided respectively with exhaust pipes 67 and 68 to which a single exhaust pipe 69 is preferably connected. V p The supply ipe 25. preferably has a valve 70 which may i e used to stop the flow of-air, or to restrict the passage of the air as a throttle in casethe air pressure is greater than necessary for the operation of the pump. The supply pipe has also a valve body 71 connected thereto and is supplied with compressed air either directly by an air compressor or through a reservoir 72. The

valve body 71 has a port 7 3 extending therethrough and also a suitable movable valve therein adapted to either stop the flow or permit full flow of compressed air through the supply pipe. Preferably the valve 'is formed as a cylindrical rod or piston valve 74 that is longitudinally movable and extends through the valve body, the valve hav- 7 ing a transverse port 75 to form communication with the port 73, the latter port being closed by the valve when thelatter is moved to carry the port 75 away. An armature 76 is connected to one end of the valve, a similararmature 77 being connected to the. opposite end of the valve, and preferably two yokes 78 and 79 are connected to the armatures. A base plate 80 is provided i and arranged in proximity to the valve body and supports an electro-magnet 81 opposite nets are opposed each to the other, and when one electro-magnet draws the adjacent armato the armature76 and also an electro-magture thereto, the opposite armature is drawn slightly away from the opposite electromagnet, whereby the valve is opened or closed. An electrical circuit wire 83 is connected with the electro-magnet 8 1, a circuit wire 84 being connected with the electromagnet 82, both circuit wires being joined to a circuit wire 85 which is connected with a suitable source of electricity, as a bat tery 86. K

For the purpose of advantageously controlling the action ofthe' electro-magnetically operated air-supply valve, the body 16 of the faucet or outlet valve is provided with an insulator 87 and the handle 18 of the rotary valve is provided with a switch point 88 arranged to sweep the surface of the insulatorduring movement of the handle. A contact point or plate 89 is embedded in the insulator and has a circuit wire 90 connected therewith that is connected with the-electro-magnet 81, the arrangement permitting the electrical circuit to be established when the valve is opened to nearly full position, the circuit being broken when the valve is further moved to full open position. Another contact point or plate 91 is embedded also in'the insulator 87 and has a circuit wire 92 connected therewith that is con- .nected with the electrounagnet 82 to esseen that the electro-magnets operate alternately and that after each operation the valve 74'remains in the osition to which it may have been moved. fireferably a spring latch 93 is mounted on the base 80 to engage one of the armatures to prevent accidental movement of the valve.

Preferably the operative mechanism of the pump is provided with a casing 94 having-a top- 95. which is secured to the wall of the air-chamber 24 and also to the wall of the valve chamber 27 the casing preferably being arranged on a main base or support 96 to which the base 80 may be secured, and

' liquids are to be elevated and particularly when inexpensive low pressure air compressors are available, the air usually being compressed and delivered through a pipe 100 to the reservoir 72 from which the compressed air may be used when the air compressor is not in operation.

In practical use, a supply of compressed air being assumed, in order to start the pump the handle 18 is turned to bring the contact point 88 to the contact point or plate 89, which establishes electrical connections resulting in energizing the electromagnet 81 which draws to it the armature 76, whereby the valve 74 is moved to open position and permits the compressed air to pass to the air chamber 24, the valve 7 0 be ing open or adjusted as'may be desired. Assuming that the port 28 is open, the air passes by the valve 40 to the conduit 31 and thence through the branch 32 to the air-conducting pipe 19 and thence into one chamber of the pump cylinder 2, the valve 41 at the same time being in its outward position and closing the port 30. Assuming that the pump cylinder is full or nearly full of the liquid or water from the well which may enter through the apertures 7 and 7','the air pressure on the top of the water in the chamber forces the water through the valve casing 14 and up through the outlet pipe 11 to and through the discharge pipe 13 and thence out of the outlet faucet or valve, the valve in the casing 14 preventing the water frompassing down and out through the pipe 12. During the time that the air is passing through the pipe 19 a relatively smallportion of the air passes by the adjusted valve 61. and into the receptacle 57 and thence into the valve chamber 26. The receptacle becomes slowly filled with air which at first expands into the receptacle until compression is produced in the receptacle suflicientto force the valve 40 outward to .close the port 28 and open the port 34, such result occurring when the chamber in the pump cylinder has become entirely or nearly. emptied, the valve 61 having been adjusted to obtain the timing efl'ect required. The movement of the valve 40 actuates, the beam 49 which obviously moves the valve-41'inward, so that while the air first utilized escapes from the pipe 19 into the conduit 31 and thence through v the port 30 and also through theduct 45 and out of the exhaust port 33, the valve 40 being then in position to close the port 29. The air pressure being released the chamber in the pump cylinder again becomes charged as before. The water is then forced from the opposite chamber of the pump cylinder in like manner by means of the compressed air which passes through the port 34, the duct 44, the port 35 and thence through the conduit 37 and through thebranch 39 to the air-conducting pipe 20, the valve 41 preventing passage of the air through the port 36. A portion of the air passes by the valve 62 and into the rece tacle 58 and thence into the valve cham er 27, finally causing the valve 41 to move outward, thus reversing the valves and returning them to 'the position indicated in Fig. 6 and permitting the air last utilized to pass out through the port 36, through the-duct 46 and out,

through the exhaust port 38, after which the operation is repeated during the continuance of the supply of compressed air, with the result that the water is forced out with a practically continuous flow. When it is desired to stop the,pump the handle 18 is turned so as to close the outlet valve, and

in doing so the contact point 88 engages the point or plate 91 to complete the elec-- trical circuit and immediately breaks the circuit as the valve is entirely closed, the

: established circuit causing energizing of the electro-magnet 82 which attracts and moves.

independently-operable: starting-valve for,

admitting compressed air to the controlling means provided with controllable operatrn means, and an outlet valve connected wit the discharge pipe and having con-trolling means controlled by the operation of the valve for controlling the operation of the controllable operating means.

2. A pneumatic pump comprising two pump chambers each with an inlet valve and an outlet valve, two air-conducting pipes connected with the pump chambers respectively, two valve chambers of which one is an intake and the other an exhaust chamber,

one end of each being open, each valve chamber having two inlet ports and two outlet ports, two controlling valves movable in the valve chambers respectively and extending beyond the open ends thereof, each controllin valve having ducts to alternately-open an close the inlet ports and the outlet ports of the chamber, a tumbler beampivotally supported and connected with the controlling valves, a conduit connected with one of the outlet ports of the intake valve chamber and also with one of the intake ports of the exhaust valve ch'amoerand having a branch connected with one of the air-conducting pipes, a conduit connected with the remaining one of the-outlet ports of the intake v: ve chamber and also with the remaining one of the inlet ports of the exhaust valve chamber and having a branch connected with the remaining one of the air-conducting pipes, an air-controlling conduit connecte with the air-conductingpipe with which the first-mentioned branch is" connected and also connected with the intake valve chamber beyond the inner end of the valve therein, and

an air-controlling conduit connected with the remaining one of the air-conducting pipes and also with the exhaust valve chamber beyond the inner end of the Valve therein.

\ 3. In a pneumatic pump, the combination of a hollowcylinder, a artition longitudinally arranged in and d viding the cylinder into two chambers, two bottom heads secured to one end of the cylinder and the partition to close the chambers respectively, each head having an external hollow guide and also an aperture on either side of the guide, two foot valves to normally seat upon the heads respectively and close the apertures therein, each valve having a stem movably guided in the hollow guide of the head, two top heads secured to the opposite end of the cylinder and the partition to close the chambers respectively, two outlet pipes extending through and secured to the top heads respectively, the outlet pipes extending nearly to the foot valves res ectively, two valve cases secured to the out et pipes adjacent to the foot valves respectively, each case having a check valve therein, and two air-conducting pipes secured to the top heads and having connection with the chambers respectively.

4. In a pneumatic pump, the combination with a plurality of pump chambers with in-- let and outlet valves, discharge pipes extending from theoutlet valves, and a plurality of air-conducting pipes connected with the pump chambers respectively, of an intake valve chamber havin inlet ports and outlet ports, an exhaust va ve cham'ber having inet ports and outlet ports, two valves operatively connected each with the other and movable in the valve chambers respectively to open or close the ports synchronously, a conduit connected with one of the outlet ports of the intake valve chamber and also with one of the inlet ports'of the exhaust valve chamber and having-a branch eonnected-with one of the air-conducting pipes, and a conduit connected with another of the outlet ports of the intake valve chamber and also with another of the inlet ports of the exhaust valve chamber and having a branch connected with the remaining one of the air conducting pipes. I

5. In a pneumatic pump, the combination with a cylinder having two pump chambers, and two air-conducting pipes connected with the twochambers respectively, of a body structure comprising a base portion and two stems fixed on the base portion, each one of the stems having a valve chamber therein, one of the stems having also an air-chamber adjacent to the valve chamber with ports between them, a conduit connected with the two valve chambers and one of the air-conductingpipes, a con-' duit connected with the two valve chambers and the remaining one of the air-conducting pipes, two valves in the valve chambers respectively to control the flow of air from the chamber that is in communication with the air-chamber to the air-conducting pipes and from the latter to the remaining one of the valve chambers.

6. In a pneumatic pump, the combination, with a pump chamber, of means for controlling the passage of air to or from the ump chamber, said'means comprising a'val ve chamber having two inlet ports and two outlet ports, one end of the valve chamber being open, the valve chamber having an exhaust port at a distance from the opposite end thereof, a valve longitudinally movable in the valve chamber and closing said open end, the valve being stopped from movement after closing said exhaust port and having a duct to open one of the inlet ports and one of the outlet ports and having also another duct to periodically open the remaining inlet and outlet ports, and means for automatically conducting air to the valve chamber beyond the valve when the base, a hollow cylinder mounted to rock on I said bracket, a push-bar movable in said cylinder and engaging one end of said beam and a spring in said cylinder acting on and yieldingly projecting said push-bar.

8. In a pneumatic pump, means for con trolling the assage of air comprising an iiitake valve 0 lest and an exhaust valve chest respectively and operatively connected each with the other for synchronous movement, each controlling valve having ducts to alternately open and close the inlet ports and the outlet ports of its chest, two air-conductmg pipes a conduit connected with one of the outlet ports of the intake valve chestand also with one of the inlet'ports of the exhaust valve chest and having a branch connected with one of the air-conducting pipes, a conduit connected with the remainin one of the outlet ports of the intake va ve chest and also with the remaining one of the inlet ports of the exhaust valve chest and having a branch connected with the remaining one of the air-conducting pipes, and an air-supply conduit having two ports extending into the intake valve chest and controlled by the controlling valve therein.

9. In a pneumatic pump, means for controlling the passage of air comprising an intake valve chest and an exhaust valve duit connected with one of the outlet ports of the intake valve chest and also with one of the inlet ports of the exhaust valve chest and having a branch connected with one of the air-conducting pipes, a conduit connected with another one of the outlet ports of the intake valve chest and also with another one of the inletports of the exhaust valve chest and having a branch connected with the remaining one of the air-conducting pipes, an air-controlling conduit connected fluid-holding receptacle connected with the A regulating valve of the first-mentioned aircontrolling conduit and having connection with the intake valve chest beyond one end of the valve therein, and a fluid-holding receptacle connected with the regulating valve of the remaining air-controlling conduit and having connection with the exhaust 5 valve chest beyond one end of the valve therein.

' In testimony whereof, I aflix my signature in presence of two witnesses.

MARION o. WALLS. I Witnesses:

' J. H, 'HARTMAN,

E. T. SILvms. 

